<!DOCTYPE html>
<html lang="zh-CN">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <!-- 1. 导入字体图标 -->
  <link rel="stylesheet" href="./iconfont/iconfont.css">
  <style>
    /* 3. 调整颜色和大小 */
    .icon-aixin_shixin {
      color: red;
      font-size: 100px;
    }
  </style>
</head>

<body>
  <!-- 2. 使用字体图标 -->
  <i class="iconfont icon-aixin_shixin"></i>
</body>

</html>